Go Back
+ servings
whole frosted black magic cake with sprinkles
Print Recipe Pin Recipe
5 from 3 votes

Black Magic Cake adapted for High Altitude

Black magic cake is made for the chocolate lover. It’s dense, moist, and decorated with a silky fudge frosting. 
Prep Time5 minutes
Cook Time35 minutes
Total Time40 minutes
Course: Cakes
Keyword: baking, cake, Dessert, food, recipe
Servings: 10 -12 servings.
Calories: 1547kcal
Author: Barbara Schieving



  • 1-¾ cups sugar
  • 1-¾ cups all-purpose flour
  • ¾ cup Hershey's Cocoa I used King Arthur All-Purpose Baking Cocoa
  • 1 ½ teaspoons baking soda
  • 1 teaspoon baking powder
  • 1 teaspoon salt
  • 2 eggs
  • 1 ¼ cup buttermilk or sour milk *
  • ¼ teaspoon King Arthur Flour Espresso powder
  • 1 cup boiling water
  • ½ cup vegetable oil
  • 1 teaspoon vanilla extract

Chocolate Fudge Frosting

  • ¾ cup 1-½ sticks butter or margarine, melted
  • 1 cup Hershey's Cocoa I used King Arthur All-Purpose Baking Cocoa
  • 4 cups powdered sugar
  • ½ cup milk
  • 2 teaspoons vanilla extract


  • Heat oven to 350°F. Grease and flour two 9-inch round baking pans or one 13x9x2-inch baking pan.
  • Stir together sugar, flour, cocoa, baking soda, baking powder and salt in large bowl. Add eggs, buttermilk (or sour milk), espresso powder, boiling water, oil and vanilla; beat on medium speed of mixer 2 minutes (Batter will be thin). Pour batter evenly into prepared pans.
  • Bake 30 to 35 minutes for round pans, 35 to 40 minutes for rectangular pan or until wooden pick inserted in center comes out clean. Cool 10 minutes; remove from pans to wire racks. Cool completely. Frost as desired.
  • * To sour milk: Use 1 tablespoon white vinegar plus milk to equal 1 cup.
  • Chocolate Fudge Frosting
  • Place melted butter in large mixer bowl. Add cocoa, stirring until smooth.
  • Gradually beat in powdered sugar, milk and vanilla, beating until smooth. If necessary add additional milk, ½ teaspoon at a time, beating until spreading consistency. About 3 cups frosting.


Serving: 1g | Calories: 1547kcal | Carbohydrates: 342g | Protein: 18g | Fat: 14g | Saturated Fat: 2g | Polyunsaturated Fat: 10g | Cholesterol: 34mg | Sodium: 455mg | Fiber: 6g | Sugar: 239g